source: trunk/demos/undo/document.cpp@ 282

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**
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** Contact: Qt Software Information ([email protected])
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
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** accordance with the Qt Commercial License Agreement provided with the
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** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
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** additional rights. These rights are described in the Nokia Qt LGPL
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
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** packaging of this file.  Please review the following information to
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#include <qevent.h>
#include <QPainter>
#include <QTextStream>
#include <QUndoStack>
#include "document.h"
#include "commands.h"

static const int resizeHandleWidth = 6;

/******************************************************************************
** Shape
*/

const QSize Shape::minSize(80, 50);

Shape::Shape(Type type, const QColor &color, const QRect &rect)
    : m_type(type), m_rect(rect), m_color(color)
{
}

Shape::Type Shape::type() const
{
    return m_type;
}

QRect Shape::rect() const
{
    return m_rect;
}

QColor Shape::color() const
{
    return m_color;
}

QString Shape::name() const
{
    return m_name;
}

QRect Shape::resizeHandle() const
{
    QPoint br = m_rect.bottomRight();
    return QRect(br - QPoint(resizeHandleWidth, resizeHandleWidth), br);
}

QString Shape::typeToString(Type type)
{
    QString result;

    switch (type) {
        case Rectangle:
            result = QLatin1String("Rectangle");
            break;
        case Circle:
            result = QLatin1String("Circle");
            break;
        case Triangle:
            result = QLatin1String("Triangle");
            break;
    }

    return result;
}

Shape::Type Shape::stringToType(const QString &s, bool *ok)
{
    if (ok != 0)
        *ok = true;

    if (s == QLatin1String("Rectangle"))
        return Rectangle;
    if (s == QLatin1String("Circle"))
        return Circle;
    if (s == QLatin1String("Triangle"))
        return Triangle;

    if (ok != 0)
        *ok = false;
    return Rectangle;
}

/******************************************************************************
** Document
*/

Document::Document(QWidget *parent)
    : QWidget(parent), m_currentIndex(-1), m_mousePressIndex(-1), m_resizeHandlePressed(false)
{
    m_undoStack = new QUndoStack(this);

    setAutoFillBackground(true);
    setBackgroundRole(QPalette::Base);

    QPalette pal = palette();
    pal.setBrush(QPalette::Base, QPixmap(":/icons/background.png"));
    pal.setColor(QPalette::HighlightedText, Qt::red);
    setPalette(pal);
}

QString Document::addShape(const Shape &shape)
{
    QString name = Shape::typeToString(shape.type());
    name = uniqueName(name);

    m_shapeList.append(shape);
    m_shapeList[m_shapeList.count() - 1].m_name = name;
    setCurrentShape(m_shapeList.count() - 1);

    return name;
}

void Document::deleteShape(const QString &shapeName)
{
    int index = indexOf(shapeName);
    if (index == -1)
        return;

    update(m_shapeList.at(index).rect());

    m_shapeList.removeAt(index);

    if (index <= m_currentIndex) {
        m_currentIndex = -1;
        if (index == m_shapeList.count())
            --index;
        setCurrentShape(index);
    }
}

Shape Document::shape(const QString &shapeName) const
{
    int index = indexOf(shapeName);
    if (index == -1)
        return Shape();
    return m_shapeList.at(index);
}

void Document::setShapeRect(const QString &shapeName, const QRect &rect)
{
    int index = indexOf(shapeName);
    if (index == -1)
        return;

    Shape &shape = m_shapeList[index];

    update(shape.rect());
    update(rect);

    shape.m_rect = rect;
}

void Document::setShapeColor(const QString &shapeName, const QColor &color)
{

    int index = indexOf(shapeName);
    if (index == -1)
        return;

    Shape &shape = m_shapeList[index];
    shape.m_color = color;

    update(shape.rect());
}